The Oklahoma Mesonet’s quality-assurance (QA) consists of four principal components:
1) laboratory calibration,
2) on-site intercomparison,
3) automated QA, and
4) manual QA.
In the instrument laboratory, all sensors are calibrated to validate or improve upon factory calibrations.
On an annual basis, the accuracy of several types of sensors in the field is verified through comparison to calibrated reference sensors housed in a portable system.
To make a first pass through the 640,000+ observations that are received at the Mesonet each day, automated QA software includes numerous algorithms to evaluate the data received from remote stations.
Finally, the Mesonet’s QA meteorologists employ numerous manual techniques to complement automated QA including analysis of monthly statistics to detect sensor drift or bias (click on a month and year to the left to download a PDF version of a Monthly Report). In addition to detecting problematic sensors, the QA meteorologists trace the true start time of each problem so that appropriate data can be manually flagged as erroneous. The QA meteorologists are responsible for communicating problems to, and coordinating with, appropriate field technicians to ensure proper resolution (see a list of the current outstanding tickets below).
Current Trouble Tickets in the Oklahoma Mesonet
(For questions regarding these tickets, contact )
|Station||Variable||Date Reported||Problem Description|
|COOK||Barometric Pressure at 0.75 m||2021-07-22 21:55:47||Values sometimes report much higher/lower and more erratically than expected. Suspect problem lies with warped/shrunken barometer tubing. Please replace barometer tubing with prepared sections of tube in FieldReady box. Bring old tube back to lab for examination.|
|TALI||229L Delta Temperature at 10cm under Sod||2021-07-14 20:17:52||Suspect failed heater. Difference between starting and final temperature negligible. Soil temperature unaffected. Please replace sensor.|
|ANT2||229L Delta Temperature at 10cm under Sod||2021-06-28 21:30:55||Both starting and final temperature report -7999. Both soil temp and moisture affected. Please replace.|
|PERK||229L Delta Temperature at 25 cm||2021-06-22 22:00:43||Suspect failed heater. Difference between starting and final temperature is negligible. Soil temperature fine. Original sensor. Please replace.|
|LAHO||Soil Temperature at 5 cm under Bare Soil||2021-06-18 16:56:10||5 cm continuity bare sensor very sensitive to solar radiation. Suspect sensor too shallow, please rebury. Replace depth rail if damaged.|
|TALI||Soil Temperature at 5 cm under Bare Soil||2021-06-18 16:54:19||5 cm continuity bare sensor very sensitive to solar radiation. Suspect sensor too shallow, please rebury. Replace depth rail if damaged.|
|OILT||Soil Temperature at 5 cm under Bare Soil||2021-06-18 16:52:16||5 cm continuity bare sensor very sensitive to solar radiation. Suspect sensor too shallow, please rebury. Replace depth rail if damaged.|
|HOBA||Soil Temperature at 5 cm under Bare Soil||2021-06-18 16:48:05||5cm bare plot continuity sensor reports -7999. Please replace. Replace depth rail if damaged.|
|BRIS||229L Delta Temperature at 10cm under Bare Soils||2021-06-07 16:20:54||Suspect failed heater. Difference between starting and final temperatures is negligible. Soil temp unaffected. Please replace sensor.|
|PUTN||229L Delta Temperature at 10cm under Sod||2021-05-17 21:27:09||Soil temperature reports errant values for several observations then returns to normal. Check sensor wiring from ports to sensor. If nothing found, please replace.|